In January I began experiencing strange muscle spasms in my left breast. It has since moved to both breasts but primarily the left. I'm also having nipple spasms. You can actually see and feel the movement, along with an almost zipping bubble-like sensation.Sometimes I'll get some pain but more often it's the spasms. Although my nipple is very sensitive on the left side, sometimes painful to touching my bra, etc. My upper ribcage has begun to pop, getting worse when I'm laying down. I do have silicone implants, going on 9 years. I had a tubal ligation 12 years ago so am not pregnant or breastfeeding. I went to see my surgeon and he found nothing wrong. Then I went to my Gynecologist and she ordered a mammogram and ultrasound and both came back negative. I'm at a loss! This is VERY uncomfortable as it goes on all day, everyday. Help!!!